Anchorage device, clamp and connector static load anchoring test total strain measurement apparatus and method thereof

Abstract

The invention relates to an anchorage device, clamp and connector static load anchoring test total strain measurement apparatus. The apparatus comprises a left sleeve, a right sleeve, a displacement sensor, a left end steel strand clamping element, and a right end steel strand clamping element, the right sleeve is coaxially sleeved in the left sleeve, the displacement sensor is arranged in a mobile sleeve, a fixed end of the displacement sensor and the left sleeve are fixedly arranged, a test end of the displacement sensor is fixedly connected with an end part of the right sleeve, the left sleeve is fixedly connected with the left end steel strand clamping element through a connection rack, and the right sleeve and the right end steel strand clamping element are fixedly connected. The anchorage device, clamp and connector static load anchoring test total strain measurement apparatus can be clamped on the steel strand, the strain value of the steel strand spacing can be detected through the displacement sensor, so that the anchorage device, clamp and connector static load anchoring test total strain and strain peak value can be detected, and detection apparatus has the advantages of convenient installation and operation, and better measurement precision.

Description

technical field [0001] The invention relates to the field of civil engineering test and detection, and is mainly used in prestressed structures, in particular to a total strain measurement device and method for static load anchorage tests of anchors, clamps and connectors. Background technique [0002] As more and more prestressed structures are used in civil engineering, the current national standards "Anchors, Clamps and Connectors for Prestressed Steel Strands for Highway Bridges" (JT / T 329-2010), "Prestressed Tendons for Railway Engineering Clip Anchors, Clamps and Connectors" (TB / T 3193-2016) and "Anchors, Clamps and Connectors for Prestressed Tendons" (GB / T 14370-2015) are both applicable to anchors, clamps and connectors The static load anchoring performance puts forward higher requirements. Most of the current static load anchoring test equipment tests the total strain, mainly by using displacement sensors to test and calculate parameters such as cylinder extension,...

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Problems solved by technology

The test data obtained in this way is low in accuracy, cumbersome, and has certain security risks

[0003] In addition, in this test, the specification requires that the maximum force value and total strain when the specimen breaks the tensile force is the peak value of the strain when the specimen is broken. This peak data must be collected by a special instrument. Generally, the display instrument does not have this function. The specification A method of directly measuring the total strain on the steel strand introduced in , has not yet formed commercial production in the existing static load anchorage test equipment, and is only a theoretical method

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